Implement custom menu items

src/openrct2-ui/scripting/CustomMenu.cpp

@@ -0,0 +1,36 @@
+/*****************************************************************************
+ * Copyright (c) 2020 OpenRCT2 developers
+ *
+ * For a complete list of all authors, please refer to contributors.md
+ * Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
+ *
+ * OpenRCT2 is licensed under the GNU General Public License version 3.
+ *****************************************************************************/
+
+#include "CustomMenu.h"
+
+namespace OpenRCT2::Scripting
+{
+    std::vector<CustomToolbarMenuItem> CustomMenuItems;
+
+    static void RemoveMenuItems(std::shared_ptr<Plugin> owner)
+    {
+        auto& menuItems = CustomMenuItems;
+        for (auto it = menuItems.begin(); it != menuItems.end();)
+        {
+            if (it->Owner == owner)
+            {
+                it = menuItems.erase(it);
+            }
+            else
+            {
+                it++;
+            }
+        }
+    }
+
+    void InitialiseCustomMenuItems(ScriptEngine& scriptEngine)
+    {
+        scriptEngine.SubscribeToPluginStoppedEvent([](std::shared_ptr<Plugin> plugin) -> void { RemoveMenuItems(plugin); });
+    }
+} // namespace OpenRCT2::Scripting